Continuous strip pickling and cleaning device



F. .1. Woon 2,325,158

CONTINUOUS STRIP PICKIING AND CLEANING DEVICE y July 27, 194.3.

1940 l5 sheets-sheet .i

Filed June 17 lNvENToR i JM ATTORNEY July 27, 1943. F. V.1. wooD A 2,325,158

K CONTINUOUS STRIP P'ICKLING AND CLEANING DEVI CE i I Filed June 17, 1940' s sheets-shet 2 F. J. WOOD July 27, 1943.

CONTINUOUS STRIP PICKLING AND CLEANING DEVICE Filed June 1'7, 1940 5 Sheets-Sheet 3 BY wml www?. P

l l l l r ATTORNEY Ynieuwe July zr, 1943 .coN'rlNUoUs snm PICKING lim) cLEANmG DEVICE v Franks. wond, Riverside, n|., .ssinr zo cmu-k man Manufacturing-'Commun Chicago, lll., -a corporation of Illinois Application June 17, 1940, serial No. 340,880

(ci. zoe-7) Y l 3 Claims. This invention relates to improvements in continuous-strip pickling and cleaning devices,

and more particularly relates to improvements in the acid trough and tank construction of such a device.Y

Heretofore continuous pickling and cleaning systems have been provided with one more pickling and cleaning tank than is necessary to thoroughly pickle and clean-the metal, so one pickling tank can be taken out of the pickling line at a time for cleaning or renewing the pickling ud, in order to prevent inecient cleaning of the metal due to the loss of one tank from the system or to prevent stopping of the entire line until the desired tank has been cleaned.

The principal objects of'my invention are to remedy this by providing a. pickling trough, through which theistrip metal passes during the cleaning operation, and by providing a plurality of interconnected settling tanks into which the pickling fluid may drain as it is discharged from the pickling trough, and arranging said settling FigureV l is a diagrammatic lplan view of a vIpiclrling' and cleaning line constructed in-ac- .Y

cordance withv my invention;

Figure 2 is a diagrammatic view in side elevation ofthe pickling and cleaning line shown in Figure 1;

FigureV 3 is an enlarged Vpartial fragmentary plan view of one of the pickling troughs shown in Figures 1 and 2, with certain parts broken away andcertain other parts shown in section;

[5,said trough; i

Figure 5 is a fragmentary transverse section- Figure 4 is a partial longitudinal sectional view showingthe discharge end of one of the pickling and cleaning troughs and also showing certain details of one of thesettling tanks for `a1 view taken substantially along line5-5 of Figure 4, but drawn to a reduced scale;

Figure 6 is an enlarged fragmentary transverse sectional view taken substantially along tanks so that uid from one tank may beused for pickling while fluid in the other tank is settling or being cleaned.

Another object of my invention is to provide a plurality of pickling troughs in linefthrough which the stripmetal passes during the cleaning operation, each'of said troughs having a plurality of settling tanks connected together so pickling, and connecting the settling tanks for one pickling trough with the settling tanks for the other pickling trough so fluid may be pumped from any of the settling tanks for one pickling trough and used in thegother pickling trough, so as to permit the pickling uid used line 6-6 o f Figure 4,;

Figure 7 is an enlarged fragmentary sectional view taken substantially alongline 'l-T of IFigure 4; and

Figure 8 is a diagrammatic view illustrating the uid circulation system,

In the drawings, the continuous strip pickling andcleaning device embodying my invention includes a coil supporting box IU disposed l at the entering end of the apparatus and formiluid from either settling tank may be used for ing a support for a coilof strip metal, permitting it to be unwound and passed through the cleaning apparatus by the usual opposed rollers. A leveler l2 consisting of a plurality of power driven leveling rolls I3, I3 engaging opfor rough pickling to be used again in bright provide a common sewer connected with the discharge ends of said pickling trough and leading to a' plurality o1' separate storage and settling tanks disposed beneath said pickling trough and adapted to selectively suppLv pickling fluid thereto.

Other objects of my invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawings wherein:

posite sides of the metal, for leveling and breakin g the scale on the metal before the cleaning operation, is provided in advance of said-coilA supporting box. A pickling trough I5 is provid- 40 ed in advance of said leveler. Squeegee and brushing and scrubbing rolls I 6, I6 are provided at the discharge end of said pickling trough.;

s'fqueegee and brushing and scrubbing rolls.

Squeegee and brushing and scrubbing rolls i9 are disposed in advance of the discharge end of said last mentioned pickling trough. From said squeegee and brushing and scrubbing rolls the metal may pass through a drier 2| to a coiler 23,

which recoils the metal. Said coil' supporting box, leveler, squeegee and brushing and scrubbing rolls, drier and coiler are only shown in an illustrative form since they are no part of .the

. present invention except insofar as the apparal tus of the present invention may be a part of an entire pickling system.

Referring now in particular to the details of the pickling troughs |5 and |1 and the settling tank construction for each of these troughs, said troughs are of a: similar-construction so like' p art numbers will be applied Ito like parts of each trough and the settling tanks therefor, and one only will herein be described in detail. Each pickling trough includes `an elongated rectangular 4metal shell 25, herein shown as beingsupported on a framework including a pluralityof spaced transversely extending I-beams 26, 26 with upright members 21, 21 extending upwardly along opposite sides of said shell.

'I'he shell 25 is provided with a lining imperviyous to the effects of the acidin the'pickling so' lution. Said lining is indicated generally by ref erence character 29 and may be a cement impervious to the effects of acid in the pickling solution, or may be acid resisting bricks set in sulphur cement, or any other suitable type of lining.' Inner metal side walls 30, 30 are provided for said trough. Said side walls are mounted on and extend along the inner sides of the lining of saidshell and may be of la sectional construction to permit ready cleaning of the trough. lSaidvside walls may be lconstructed from any usual type of acid resisting vmetal butare preferably constructed from a cast iron having a, high silicon content so as to resist-the effects of the acid of the pickling solution, and also lto resist the abrasive effects of the edges of the metal as it passes through said trough. The entire trough is covered by` a sectional cover 32. A plurality of spaced apart blocks or runners V33, 33 are provided along the bottom of the pickling trough to form a surface along'which the metal may slide during pickling. As herein shown, said runners are mounted ontransversely is adapted to supply fiuidto a pipe 39. Said pumps may be centrifugal pumps of aconstruction well knownto those skilled in theart andy are connected with said longitudinally extend'l ing pipes by means of pipes 42, 42.

A plurality of settling tanks 44, 44 is provided beneath each pickling trough and a pump 4| is the pipe 45 with the pipe 46. A pair of valves- 49, 49 is provided in the pipe 45 on each side of the pipe 41 to shut off either settling tank 44 from either of the pumps 4|, 4|. A valve 50 is provided in each pipe 42 to shut off the supply of fluid from said pipe and its connected pipe 33 when desired. `Thus pickling fluid may be pumped from either settling tank by either or4 both pumps 4|, 4| and circulated through its connected pipe 39 and the associated nozzles 36, 36.

A connection is provided between the pressure sides of the pumps 4|, 4| for each set of settling tanks for the pickling troughs I5 and |1, to connect the settling tanks for thepickling trough I5 with the settling .tanks for the pickling trough |1, so pickling fluid from either one of the first set of settling tanks 44, 44 may be used for pick- I ling in the second pickling trough, and pickling fluid from either one of the second set of settling tanks maybe used in the first pickling trough passes thereover, s uchas glass or various forms Fluid enters the pickling trough from the sidesl thereof beneath the top of the runners 33,-33 through spaced apart pipes 36, 36, the ends of which extend into transversely recessed portions 31, 31, formed in the bottom of said trough. Said pipes open into said recessed portions so as to circulate pickling fluid transversely of said trough. The volume of fluid coming through said pipes is sufficient to permit the pickling fluid to discharge through the ends of said trough and through a discharge opening 33 in the discharge end thereof and still maintain the level of the pickling fluid above the tops of the runners 33, 33 so both surfaces of the metalwill be adequately pickled. Said. pipes are connected with longitudinally extending pipes or conduits 39, 33

extending along said trough and herein shown as being dsposedthereabove. in shown as being in longitudinal alignment with each other and one of said pipes extends along one portion of one trough, for supplying pickling fuid thereto, While the other pipe extends along the vother portion of the same trough. Fluid is supplied to said longitudinally extending con-K` duits by means of a pair of spaced apart fluid pressure pumps 4|, 4| each one of which pumps if desired. Said connection includes a pipe 5| vhaving connection with the pressure sides of the pumps 4|, 4|, and pipes `52,- 52 leading from said pipe to the desired settling tank 44 (see Figures l, 3 and 8). A valve 54 is provided in each pipe 52, to control the flow of pickling fluid into the desired settling tank. Valves 55, 55 are provided in said pipe adjacent each pump 4| to control the ow of pickling fluid into said pipe from saidpumps. Fluid may thus be taken from any settling tank 44 and circulated through the system or may be emptied from any one tank and p ut into any other tank or tanks by means of the pumps 4 4 I.

Waste pickling fluid is conducted to the desired settling tank 44 for each pickling trough, by

` means of sewers 53, 53. One of said sewers ex- Said pipes are here'- is provided with openings or drains 56, 56. Each v of said drains leads to one of the settling tanks 44.' Said` drains may be closed by a valve of any suitable construction or by means of a stopper. As herein shown, a stopper 51 is provided to close said opening. Access to said stopper may be had through covers 58, 53 for said sewer, and said Stoppers may be pulled by means of a rod or chain connected thereto (not shown).

It may be seen from the foregoing that a new and improved arrangement-of aligned pickling troughs and settling -tanks has .beenlprovided which is so arranged that pickling fluid in one tank may be used as pickling fluid in the other tank settles, or while the other tank is being cleaned, and that pickling uid in any settling tank may be used in any desired pickling trough, thus avoiding delays which might, be caused by shutting down the system for cleaning the tanks.

While I have herein shown and described one form in which my invention may be embodied,

it will be understood that the construction thereof and the arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, I do not wish to be construed as limiting my invention to the speciiic embodiment illustrated, excepting as it may be limited in the appended claims.

I claim as my invention:

1. In a continuous strip pickling and cleaning device, a pair of aligned pickling troughs. through which a strip of metal is adapted to pass during the pickling operation, a plurality of settling tanks arranged beneath each of said pickling troughs, nuid pipes connecting said rtanks together, .valves in said pipes arranged to shut ofi the flow of iluid from any one of said tanks to any other of said tanks, other uid pipes connecting said tanks with said pickling troughs.

valves in said, pipes arranged to shut off the now of uid from any one of said tanks to any one of said pickling troughs. pumps for circulating iiuid through said pipes from any one or more of said tanks to any other -oi said tanks and from any one or more of said tanks to any of said pickling troughs, l a separate sewer extending along the ends and oneside of each pickling trough :fpricollecting the fluid discharged from its assoc ated trough, connections between-each sewer and the settling tanks associated with said trough. selectively operable topermit fluid to flow from said sewer to any one of its associated tanks.

2. In a continuous strip pickling and cleaning device, a pair of aligned pickling troughs through which a strip of metal is adapted to pass during the pickling operation, and means whereby pickling nuid in one trough may be used in the other trough and whereby pickling nuid in either of said troughs may be changed without stoppingsettling tanks arranged beneath each of' said pickling troughs and adapted to receive fluid discharged therefrom, fluid passageways connecting all of said tanks together, valves in said passageways arranged to control the flow of iluid from any one of said tanks to any other of said tanks, other fluid passageways connecting said tanks with said pickling troughs, valvesl in said pas-y sageways arranged to control the dow o! huid from any one of said tanks to anyone of said pickling troughs, and a pump associated with each pickling trough, said pumps being located in said last mentioned passageways, for circulat- 'ing vfluid from said tanks to .saidy troughs and between any one of said tanks. a

- 3. In a continuous strip pickling and cleaning.

' including a plurality of settling tanks arranged beneath each of said pickling troughs, fluid passageways arranged to selectively connect each sewer with the settling tanks beneath its associated pickling trough, fluid passageways connect-- ing all of said tanks together, other fluid passageways connecting said tanks.y with said pickling troughs, valves in said passageways arranged to shut of! the dow of fluid from any one of said tanks to `,my other of said tanks. and from any one of said tanks to any one of said troughs, a

pump associated with eachpickling trough, said pumps being located in said passageways leading from said tanks to ysaid troughs, for circulating uld between any one or more of said tanks and from any one or more of ysaid\tanks to any one of said pickling troughs.

the pickling operation including a plurality of ,l

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